Radiatok unit



Feb. l2, 1929. 1,701,752

, F. GARGIULO RADIATOR UN I T Filed April 20. 1921 2 Sheets-Sheet l mlllllllllll'llllllllllf da@ infill@ @uw nul uw Feb.' l2, 1929.

F. GARGIULO RADIATOR UNIT 2 Sheets-Sheet 2' Filed April 20. 1921 Patented Feb. l2, 1929.

UNITED STATES FREDERICK GARGIULO, OF NEW HAVEN, CONNECTICUT.

RADIATOR UNIT.

Application led April 20,

This invention relates to radiators Vand more particularly radiators for cooling the engines of automotive vehicles and is especially concerned with elongated radiator units comprising one or more tubes which are adapted for use in the construction of such radiators. While the invention may be found particularly useful in connection with radiators of this type, the principles thereof are not limited to such radiators, however, but may be used in connection with others.

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Heretofore it has been common to provide tubular radiator units consisting of separate tubes of appropriate'material, such as brass, copper, or other suitable metal, each tube having a plurality of fins or flanges suitably secured to the exterior surface of the tube as by soldering. The fins are spaced from each other at appropriate intervals and .usuallyV formed in the shape of a fiat disk or plate which projects laterally from the tube, the parts of the fin lying in a single plane, the purpose being to increase the effective radiating surface of the tube and thereby increase the cooling effect.

With such an arrangement it is seenthat the air in passing throughthe radiator and cooling the fluid therein will pass directly from .the front to the back of the radiator without having absorbed as much heat from the fluid within the radiator as is possible. It is, therefore, proposed to construct a radiator such that the air will not be allowed to pass directly through the same,but will be deflect-V ed transversely of the direction of this passage and its turbulence will be so increased by the formation of transverse waves that when it finally emerges it will have absorbed practically all of the heat from the fluid within the radiator that it is capable of absorbing.

One object of In invention is, therefore, to provide a new an improved radiator wherein transverse waves will be set up in the air or cooling fluid passino therethrough so that the turbulence thereoi? will be increased to y render the radiator much more eiiicient.

1921. semir No. 463,023.

provide a new and improved fin surrounding the tubes of' one oit the radiator units.

Further my invention consist-s in the provision of-a tubular radiator unit Which shall consist of a plurality of tubes having at least some of-their walls in common, that is, formed from the same piece of material, such tubes being placed substantially in a row and surrounded by a fln of such character that it will deflect thecurrents of air striking the same to the adjacent fin above or below the one under consideration, where it will in turn be redefiected to the first fin .so that the existence of cold cores in the air passing through the radiator will be eliminated or substantially reduced. A

The iin structure which I `rovide to increase theradiating surface o the fluid carrying tubes may consist either' of individual fins, each of which is provided with an opening to receive the tubes, or a continuous plate extending transversely across the radiator and provided with a plurality of openings, each of which is adapted to receive one of the tubular units. f

To these and other' ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig.'1 is a front elevational view of an engine cooling radiator embodying my improvements Fig.` 2 is a detail elevational View of a portion of the same, some parts being shown in section;

Fig. 3 is a sectional view along line 3-3 of Fig. 2;

Fig. 4 is a top plan view of one of the tubular radiator units;

Fig. 5 is a sectional view on line 5 5 of Fig. 3; f Fig. 6 is a sectional view on line 6-6 of Fig. Ll;

Fig. 7 is a top plan view of a tubular radiator unit showing a somewhat modified construction;

Fig. 8 is a d etail elevational View similar to Fig. 2, but showing a modified construction in which the fin structure is shown as a con tinuous plate extending transversely of the radiator and the tube structure is shown as one elongated tube extending from front to rear of the radiator;

Fig. 9 isa plan sectional View on line 9-9 Fig; is a view similar to Fig. 9s'liowif'ing Aa modified construction in which the tube structure extendingfrom front to rear of the radiator consistsV of a plurality ofseparate tubes.

I have selected for illustration an vengine cooling radiator particularly adapted for use .on automotive vehicles, for. example, motor trucks driven by internal combustion engines, in whcli `case the water `for cooling the engines Y circulates in a generally Vertical direction between the upper and lower tanks or headers,

. air, nor to cases where interchange of heat is elfectedbetween fluids ot these two kinds.

In the drawing, the tubular radiator'units 10 are shown as set in between and connected with upper and lower water tanks or headers 11 .and 12 respectively. These tanks are shown'as connected by the side spacing meinbers13 and 14.

1 The upper tankv 1lV is more fully shown in Fig. 2 where it is yshown asbolted to a header plate 15, which forms the lower base ofthe tank 11, and is provide-d with a plurality of openings or perforations 16 forthe insertion of the tubes which provide the communication between the upper and lower tanks. i

VThe invention is particularly concerned with construction of the tubular yunits connecting the two tanks and the iins which are provided thereon to'increase the radiation therefrom. As clearly shown in Figs. 4l and 6, each tubular unit 10 is formed of a plurality of tubes 17 which are disposed in substantial alignment froni front to bac-k of vthe radiator, although this disposition may be varied, if desired. Three of these tubes are shown' as constituting one of the vunits 10, although the exact number used is not iniportant andinay, of course, be varied as de-V sired. f

As shown, the units consist of two spaced walls 18 and 19, which are connected at their ends to close the tubes at the ends of the series- As shown in Fig.` 1l, it may be found desirable to form these two walls 18 and 19 of a single sheet of metal, which will be turned or bent back upon itself atan intermediate portion to form one end 2O of the series of tubes, while the other ends are lapped, as shown at 21, and'soldered to forni a vvwitertight joint at the other end of the series. If a separate sheet of metal is used for each of the walls 18 and 19, they would, of course, have their edges lapped and soldered at both ends of the tubular unit,

VIn any event the wall 18 will consist of a single piece of material which will extend along and form a common wall for a plurality ofthe tubes. A

To form the partit-ions between the adjacent tubesof a series, grooves are provided in the walls 18 and 19, which forni convexY shoulders 22 upon the opposite side of said walls, which shoulders project toward eachother and meet when the two walls are assembled, thus forining` Apartitions between` the adjacent tubes and serving' to space thewalls 18 and 19 the required distance apart. The meeting edges of the shoulders 22 are soldered 'so as to form a watertight joint between the adjacent tubes.

Y Fins E23,l as shown in Fig'. 3, are provided with, an elongated opening andV placed upon the tubular unit above described, so that the row of tubes is received within the `opening provided and the fins arethen soldered in place. The lins are provided with small flanges 24 which assist in connecting the fins rigidly to the tubes and also increase the conn, ducting surface between the lin and tubes.

formed with the front half just described being inclined upwardly from 1the `point denoted by the letter b to that denoted by the letter c and then inclined downwardly from that point to thesend of the'fin. The intermediate portion of the fin between the` points a and c forms a trough, the edges of which, lying beyondthes'e points, are Vdownwardly inclined.` j y As will be obvious from an inspection of the drawing, when 4the air strikes the front portion of any one of the tins, the particles of air which lie above the lin will be Vde` flected toward the lower downwardly inclined surface ofthe fin just above the one f under consideration, while the particles of lair which lie below the lin will strike the downwai'dly inclined surface thereof. 'It will be' seen, therefore, that the passage ofj air through the radiator in a straight line is, to

some extent, prevented and, moreover, the currents of air are so deectedthatthey strike the surface of the fins at an inclination and `are thereby effectively spread out so that a Vto the surface thereof. When the air strikes the downwardly inclined surface of a .tin between the points a and I), it will be deflected `to lthe upwardly inclined surface of the fin below between the points I) and 0. It will then-pass to the downwardly inclined surface between the point c and the rear end ofthe fin. It will be obvious that a very effective cooling and exchange of heat between the fluid passing through the tubes and the fluid passing between the fins will be brought about. The iins are also provided with corrugations 25 extending around the same, as shown in Fig. 4, which will serve to increase the disturbance in the air passing' through the radiator and also serve to st-rengthen the same.

As shown in Fig. 4, when each tubular unit is formed of one sheet of material, so that only one soldered joint 21 is required, this is placed at the back of the radiator where it will be conveniently accessible in case repairs are needed. Moreover, this is a decided advantage in the construction shown in Fig. 4 where the tubes of one of the units have a common wall such as the walls 18 or 19, so that the joints will occur at the front or back only. If the two walls are formed separately, there will, of course, be a joint at both front and back walls.

In Fig. 7 I have shown a modi tied construction wherein the tubes 17 comprising the unit 10 are formed separately, and in this case the fin 27 is provided with three openings or one for each of the separate tubes 17 instead of one elongated opening to receive all of the tubes, as in the form shown in Figs. 1 to 6. The fins 27 used in connection with this unit are of the same type as that just described in connection with the other figures of the Adrawings and will act in the same way when in use. f

In the construction of the form of my device shown in Figs. 1 to 6, a piece of sheet metal of appropriate size may be provided with the grooves required to form the shoulders 22 at the necessary places and then bent upon itself to form the two parallel walls 18 and 19, the ends overlapping, as shown 1n Fig. 4, and the shoulders 22 meeting to form the partitions between the tubes. The fins may then be slipped upon the unit thus formed and the whole dipped into a bath of solder' to secure the fins to the tubes and to make watertight the lap joints at the rear ends of the tubes. The exact order in which the steps are carried out, however, to con- Y 2 and 3, except. that instead of consisting of fins which are separately formed, a plate is provided which is formed in cross-section like the separately formed fins of Fig. 3 to extend across the radiator and embrace a plurality of the tube structures. It may be here stated that the term-tube structure, as used in this application, denotes the fluid carrying passages and may refer to a tube structure consisting of separate passages or ducts, as shown iu 4 and 7, or toone elongated tube, such as shown in Fig. 9. In like manner the terni fin structure is used broadly to refer either to "separate fins individual to a tube surrounded thereby, as shown in Fig. 2 or to a fin structure in the form of a plate embracing a plurality of tube structures, such as is shown in Fig. 9.

In Fig. 10 I have shown in plan view a portion of a radiator in which the tubular units are composed of separately formed tubes 17 as shown in Fig. 7, surrounded by a Atin structure which consists of a continuous plate 27a similar to the plate 23b shown in connection With the elongated tube in Fig. 9. This plate 27at will, as previously described, be similar in cross-sectionto the fins 23 shown in Figs. 1 to 6. `In case a continuous plate is employed, bent to provide deflecting portions, as shown and described in connection with Figs. 8, 9 and 10, the shallow corrugations in the plate shown in the drawings as surrounding the respective tube struc tures, may be omitted if desired, the main feature in this` case being the shaping of the plate in such amanner by bending or otherwise as to cause the deflection of air in the manner previously described. It is, of course, obvious that the particular tube structure shown in Fig. 4 may be provided 'with the continuous plate of Fig. 9, with or with- -out the surrounding corrugations.

Thile I have shown and described with particularity some preferred forms of my invention, it is understood that the same is not to be limited thereto in all of its details, but is capable of any modifications and variations which lie within the spirit of the invention and within the scope of the appended claims.

lVhat I claim is:

l. A fin for tubular radiators, comprising an elongated body provided with an opening adapted to receive a tubular structure havingI a plurality of aligned parallel iiui d channels,

` said elongated body having portions adj acent its front and rear edges turned at a slight angle to the horizontal, and an intermediate V-shaped portion adapted to extend beyond the tubular structure at the front and rear of an intermediate fluid channel and to overlap the front and rear fluid channels and to extend outwardly away from said tubular structure at each side thereof.

2. In a radiator for a motor driven vehicle wherein a cooling fluid Vis caused to rapidly pass therethrough, a radiator Core compris! water channels of each series having a plu-Y rality of spaced apart horizontally disposed iinfstruoturee 'associated therewith, said lin structures extending froinheyond the front water channel to beyond the rear water channel and at the (sides thereof, Said fin structures being inclined upwardly foiwailllyof the' front water Channel7 inclinedV downwardly and then upwardly intermediate the frontand rear water Channels, and inclined-down'- wardly rearwardly of the rearwater chan.V nels, whereby the rapidly passing cooling' `my hand this 18th day of April, QQ.

FREDERICK GARGIULO. 

